<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Index</title>
    <style>
        .container {
            width: 1020px;
            margin: 10px auto;
        }
        .img1 {
            width: 1020px;
            height: 200px;
        }
        .clear {
            clear: both;
        }
        ul {
            list-style-type: none;
            padding: 0;
            margin: 0;
        }
        li {
            float: left;
        }
        li a {
            display: block;
            font-size: 20px;
            text-decoration: none;
            width: 170px;
            background-color: #BEBEBE;
            height: 50px;
            line-height: 50px;
            text-align: center;
            border-bottom: 3px solid darkred;
            color: white;
        }
        li a:hover {
            background-color: darkred;
        }
    </style>
</head>
<body>
<div class="container">
    <div class="banner">
        <img class="img1" src="http://inews.gtimg.com/newsapp_match/0/3474275579/0">
    </div>
    <div class="nav">
        <ul>
            <li><a href="#">LINUX</a></li>
            <li><a href="#">NETWORK</a></li>
            <li><a href="#">PYTHON</a></li>
            <li><a href="#">HTML</a></li>
            <li><a href="#">CSS</a></li>
            <li><a href="#">JAVASCRIPT</a></li>
        </ul>
    </div>
    <div class="clear"></div>
    <div class="content">
        <div class="left">left</div>
        <div class="right">right</div>
    </div>
    <div class="footer">
        <a href="#">达内云计算</a> &copy; 达内
    </div>
</div>
</body>
</html>